Checkout system executable code monitoring, and user account compromise determination system

ABSTRACT

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a checkout system executable code monitoring, and user account compromise determination system. The system monitors executable code initiating and executing on checkout systems, including determining hashes of the executable code. The system determines whether the executable code is malicious based on the hash, and associated information of the executable code. Additionally, the system monitors user access to checkout systems, and determines user accounts associated with being compromised. User interfaces are generated describing checkout systems associated with a risk of being compromised, and are configured for user interaction, which cause generation of updated user interfaces and access to electronic data stores to determine information relevant to the user interaction.

CROSS-REFERENCE TO RELATED APPLICATIONS

Any and all applications for which a foreign or domestic priority claim is identified in the Application Data Sheet as filed with the present application are hereby incorporated by reference in their entirety under 37 CFR 1.57.

BACKGROUND

Self-checkout systems have gained prominence in businesses (e.g., supermarkets, drug stores, etc.) as a way to reduce labor costs and provide consumers with differing methods of paying for products. The self-checkout systems can include a computing system configured to identify products (e.g., a bar code scanner), and process payment instruments (e.g., cash or credit card of a consumer). Self-checkout systems can be accessed by a system administrator to install software on the computing system (e.g., a privileged administrator user account), and the self-checkout system can be in communication with one or more server systems (e.g., controlled by a business which includes the self-checkout system, or an intermediary company associated with the business) over a network (e.g., the Internet).

SUMMARY

Checkout systems utilized by businesses are clear targets for malicious activity. Checkout systems process sensitive information (e.g., payment information), and thus have access to sensitive information of each consumer that utilizes a checkout system. In a large business, such as a national or global supermarket, the business might use tens, or even hundreds, of thousands of checkout systems. Determining whether a single checkout system is executing malicious code, or whether user accounts have been compromised by a malicious actor, creates a massive technical hurdle. Previously, businesses would purchase checkout systems from manufacturers, and rely on the checkout systems being securely locked down. However, once businesses introduce checkout systems for use by consumers, they have little way of knowing whether the checkout systems are being subsequently tampered with, or whether user accounts with access to them are being compromised. By monitoring execution of code on each checkout system, including performing cryptographic hashes of unknown code, a system described below can identify checkout systems as being compromised. Furthermore, the system can determine whether user accounts that can access checkout systems have been compromised, by monitoring specific actions performed by user accounts. Through examining executable code and user account behavior, the system improves network security, and guards against checkout systems performing malicious actions.

Particular embodiments of the subject matter described in this specification can be implemented so as to realize one or more of the following advantages. A system can quickly identify whether any checkout systems utilized in a business have been compromised by an attacker, and enable quickly stopping the attacker from obtaining further sensitive information (e.g., credit card numbers) of consumers. The system can compare processes executing in memory of the checkout systems to known valid processes, and determine whether unknown processes, or processes known to be malicious, are executing on the checkout systems. Additionally, the system can determine that checkout systems have been accessed by user accounts in suspicious or risky manners, and quickly flag (e.g., identify for review) the checkout systems and user accounts. In this way, the system can provide quick insights (e.g., to a user) into hundreds, thousands, millions, of checkout systems in use by a business. Furthermore, the system can obtain transaction data and quickly identify sensitive information (e.g., credit card numbers) that might have been improperly obtained by a malicious actor (e.g., by determining compromised checkout machines and obtaining transaction data from the compromised checkout machines). In this way, a business can quickly identify compromised sensitive information, and alert the affected consumers.

It has been noted that design of computer user interfaces “that are useable and easily learned by humans is a non-trivial problem for software developers.” (Dillon, A. (2003) User Interface Design. MacMillan Encyclopedia of Cognitive Science, Vol. 4, London: MacMillan, 453-458.) The present disclosure describes various embodiments of interactive and dynamic user interfaces that are the result of significant development. This non-trivial development has resulted in the user interfaces described herein which may provide significant cognitive and ergonomic efficiencies and advantages over previous systems. The interactive and dynamic user interfaces include improved human-computer interactions that may provide reduced mental workloads, improved decision-making, reduced work stress, and/or the like, for a user. For example, user interaction with the interactive user interface via the inputs described herein may provide an optimized display of, and interaction with, graph data, image data, and/or other data, and may enable a user to more quickly and accurately access, navigate, assess, and digest the data than previous systems.

Further, the interactive and dynamic user interfaces described herein are enabled by innovations in efficient interactions between the user interfaces and underlying systems and components. For example, disclosed herein are improved methods of receiving user inputs (including methods of interacting with, and selecting, images, graphs, and other types of data), translation and delivery of those inputs to various system components, automatic and dynamic execution of complex processes in response to the input delivery, automatic interaction among various components and processes of the system, and automatic and dynamic updating of the user interfaces (to, for example, display the relevant data from various different applications and/or data sources). The interactions and presentation of data via the interactive user interfaces described herein may accordingly provide cognitive and ergonomic efficiencies and advantages over previous systems.

Various embodiments of the present disclosure provide improvements to various technologies and technological fields. For example, existing data aggregation and analysis technology is limited in various ways (e.g., limited in the types of applications or data sources the data may be drawn from, loss of data interactivity, etc.), and various embodiments of the disclosure provide significant improvements over such technology. Additionally, various embodiments of the present disclosure are inextricably tied to computer technology. In particular, various embodiments rely on detection of user inputs via graphical user interfaces, aggregation of data from different applications and data sources, and automatic processing, formatting, and display of the aggregated data via interactive graphical user interfaces. Such features and others (e.g., automatically determining an application or data source an inputted link is directed to, accessing the application or data source to retrieve and display the requested data, implementing interactivity of displayed data reflective of how the data would be displayed in its native application) are intimately tied to, and enabled by, computer technology, and would not exist except for computer technology. For example, the interactions with displayed data described below in reference to various embodiments cannot reasonably be performed by humans alone, without the computer technology upon which they are implemented. Further, the implementation of the various embodiments of the present disclosure via computer technology enables many of the advantages described herein, including more efficient interaction with, and presentation of, various types of electronic data.

In general, one innovative aspect of the subject matter described in this specification can be embodied in methods that include the actions of obtaining checkout system data from a plurality of checkout systems associated with a business, wherein the checkout system data identifies processes executing in memory of each checkout system, and user account access information indicating user account access attempts; determining whether the checkout system data identifies processes, executing in memory of one or more checkout systems, that are not known to be valid; determining, using the user account access information, anomalous user behavior of user accounts; generate user interface data describing the processes not known to be valid and anomalous user behavior; and provide at least a portion of the generated user interface data for presentation on a user device.

Additional embodiments of the disclosure are described below in reference to the appended claims, which may serve as an additional summary of the disclosure.

In various embodiments, computer systems are disclosed that comprise one or more hardware computer processors in communication with one or more non-transitory computer readable storage devices, wherein the one or more hardware computer processors are configured to execute the plurality of computer executable instructions in order to cause the computer system to operations comprising one or more aspects of the above-described embodiments (including one or more aspects of the appended claims).

In various embodiments, computer-implemented methods are disclosed in which, under control of one or more hardware computing devices configured with specific computer executable instructions, one or more aspects of the above-described embodiments (including one or more aspects of the appended claims) are implemented and/or performed.

In various embodiments, non-transitory computer-readable storage mediums storing software instructions are disclosed, wherein, in response to execution by a computing system having one or more hardware processors, the software instructions configure the computing system to perform operations comprising one or more aspects of the above-described embodiments (including one or more aspects of the appended claims).

Further, as described herein, various embodiments of the system may be configured and/or designed to generate user interface data useable for rendering the various interactive user interfaces described. The user interface data may be used by the system, and/or another computer system, device, and/or software program (for example, a browser program), to render the interactive user interfaces. The interactive user interfaces may be displayed on, for example, electronic displays (including, for example, touch-enabled displays).

The details of one or more embodiments of the subject matter of this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a block diagram of checkout systems in communication with a compromise determination system.

FIG. 2 illustrates a block diagram of an example compromise determination system.

FIG. 3 is a flowchart of an example process for determining checkout systems with a risk of compromise.

FIG. 4 is a flowchart of an example process for determining user accounts exhibiting anomalous user behavior.

FIG. 5 illustrates an example user interface describing processes executing on checkout systems that are not known to be valid.

FIG. 6 illustrates an example user interface identifying processes not know to be valid.

FIG. 7 illustrates an example user interface displayed upon selection of a particular process not known to be valid.

FIG. 8 illustrates an example user interface describing anomalous user behavior on checkout systems.

FIG. 9 illustrates an example user interface identifying user accounts and associated alerts identifying anomalous user behavior.

FIG. 10 illustrates a user interface after a user selection of a particular checkout system.

FIG. 11 illustrates an example user interface describing transaction data.

FIG. 12 illustrates an example user interface describing detailed information regarding transaction data in a particular region.

Like reference numbers and designations in the various drawings indicate like elements.

DETAILED DESCRIPTION

When purchasing products, or other goods, at a business, consumers can pay for the products using payment instruments such as credit cards. During processing of payment cards, checkout systems obtain sensitive payment information (e.g., credit card numbers), and provide the sensitive information to an outside system (e.g., a credit card company). A malicious actor can initiate a process to execute in memory of a checkout system that can obtain the sensitive payment information, and later relay the information to a system controlled by the malicious actor. In this way, payment information can be ‘skimmed’, that is, obtained from checkout systems causing a data breach and loss of trust by consumers of the business.

This specification describes a compromise determination system that can obtain information from checkout systems (e.g., processes executing on each checkout system, user account access information, and so on), and determine whether one or more of the checkout systems have been compromised by a malicious actor. In this specification, a checkout system is any system that receives payment information from a consumer (e.g. credit card information, cash, electronic payment through BLUETOOTH, Near Field Communications (NFC), Wi-Fi, and so on). A checkout system can include a self-checkout system, a checkout system configured to be operated in part by an employee of a business, a Point of Sale (POS) system, a system associated with Merchant Exchange, and so on. A process executing in memory includes any executable code (e.g., binaries) executing, or resident, in a memory (e.g., non-volatile, volatile memory) included in or accessible by a checkout system.

The compromise determination system can compare information describing processes executing in memory of checkout systems to known valid processes (e.g., processes associated with a business or a company that manufactures the checkout systems) to determine whether one or more checkout systems are executing unknown, or malicious, processes. Information describing a process can include a name of the process, a file path of the process, and/or a hash of the process (e.g., using cryptographic hash functions, such as MD5, SHA-2 or SHA-3). Upon a positive determination, the compromise determination system can provide information identifying the checkout systems for presentation to a user (e.g., for review by the user).

The compromise determination system can also determine anomalous user behavior associated with checkout systems, and provide information identifying the affected checkout systems and user accounts for presentation to a user. In this specification, anomalous user behavior is any behavior associated with a user account that is indicative of a risk of compromise of the user account. For instance, the compromise determination system can identify user accounts with privileged rights (e.g., administrator rights) that have never accessed checkout systems, and suddenly are accessing one or more checkout systems. Additionally, the compromise determination system can identify user accounts with privileged rights that normally access checkout systems in a particular geographic region, and are now accessing checkout systems in a different geographic region. Determining anomalous user behavior will be further described below, with reference to FIG. 4.

Through analyzing processes executing in memory of checkout systems, and determining anomalous user behavior, the compromise determination system can quickly provide insights into the safety of checkout systems associated with a business (e.g., determine whether any checkout systems have been compromised).

As will be described below, the compromise determination system can generate, or provide information to a presentation system that generates, user interfaces for display to a user (e.g., a Chief Security Officer, or persons at a business responsible for network and/or consumer security such as a system administrator) for review. The user can view flagged (e.g., highlighted or otherwise identified) checkout systems and/or user accounts that should be reviewed by the user (e.g., to determine whether they have been compromised). Upon selection of a particular flagged checkout system, the user can view data identifying, for instance, unknown, or known to be malicious, processes executing on the selected checkout system. Upon selection of a particular flagged user account, the user can view information associated with the user account (e.g., name of a person associated with the user account, role of the person, other user accounts accessed by the selected user account; checkout systems accessed by the selected user account), and quickly determine whether the selected user account has been compromised. Example user interfaces are described below, with reference to FIGS. 5-12. In this specification, user interface data can include any data (e.g., executable code, interpretable code, images, video, and so on), that can be utilized to generate user interfaces. For instance, user interface data can include code defining a web page (e.g., HTML, XML, and so on), which a user device can receive and process (e.g., render) to display the web page.

FIG. 1 illustrates a block diagram of checkout systems 4 in communication with a compromise determination system 100. The checkout systems 4 are included in different stores (e.g., Business stores A-C 2A-2C) of a particular business (e.g., a retailer, a drug store, a supermarket, and so on) across a geographic area (e.g., the United States).

The compromise determination system 100 can obtain checkout system data 6 from each checkout system 4 utilized by the business, which can include information describing processes executing in memory of each checkout system, user account access information (e.g., information obtained from security logs, active directory logs, information included in Access Control Lists, Group Memberships, and so on, describing user access attempts, actual user access, user access rights and so on), and transaction data (e.g., encrypted transaction data identifying payment instruments utilized by consumers). In some implementations, the compromise determination system 100 can be in communication with a system that aggregates information from checkout systems, and provides the aggregated information to the compromise determination system 100 (e.g., at particular intervals of time). Additionally, in some implementations user account access information can be obtained from outside systems including domain controllers, virtual private network (VPN) logs, and so on.

Upon receipt of the checkout system data 6, the compromise determination system 100 can determine whether any of the checkout systems 4 are executing processes not known to be valid, and thus potentially malicious. To effect this determination, the compromise determination system 100 can access information describing valid processes (e.g., processes included in the checkout system to execute by a manufacturer, processes initiated by a business, or processes otherwise identified as valid), and compare the valid processes to the processes received from the checkout systems 4. As will be described below, with reference to FIG. 3, the compromise determination system 100 can compare names of the processes, file paths of the processes (e.g., locations in each checkout systems' file system that store executable code associated with the processes), and/or hashes of the processes (e.g., cryptographic hashes of executable code associated with the processes).

Furthermore, upon receipt of the checkout system data 6, the compromise determination system 100 can determine anomalous user behavior associated with any of the checkout systems 4. As will be described below, with reference to FIG. 4, the compromise determination system 100 can identify (e.g., for presentation to a user) user accounts associated with behavior indicative of a risk of compromise.

In some implementations, the compromise determination system 100 can also receive transaction data from each checkout system 4, describing specific transactions made by consumers along with respective payment instrument (e.g., credit cards). As will be described below, with reference to FIGS. 11-12, a reviewing user (e.g., a system administrator) can identify checkout systems as being compromised, and then, using the transaction data, alert consumers that made use of the checkout system of possible malicious activity. When reference is made to personal information (e.g., identifications of consumers, payment instruments, and so on) being received and/or stored, all personal information can be encrypted for later review by only authorized users, and/or personal data can be anonymized.

After the compromise determination system 100 determines checkout systems and user accounts to be reviewed by a user (e.g., a system administrator), the compromise determination system 100 can provide identifications 8 of the determined checkout systems and user accounts to a presentation system 120 (e.g., in communication with a user device 130).

The presentation system 120 can generate user interface data that identifies checkout system and user accounts to be reviewed by a user. The user interfaces can include information relevant to determining whether the identified checkout system and user accounts have been compromised. For instance, the user interfaces can include a list of running unknown processes on a checkout system, along with identifications of other checkout systems that are also running each process, a time of when the process started, a user account that initiated execution of the process, a reference to a user interface with information describing the user account, all user accounts that have accessed or attempted to access the checkout system, and so on. User interfaces are described more fully below, with references to FIGS. 5-12. In this way, a reviewing user (e.g., a system administrator) can have immediate access to all information relevant to determining whether a user account or checkout system has been compromised.

FIG. 2 illustrates a block diagram of an example compromise determination system 100. The compromise determination system 100 can be a system of one or more computers, or one or more virtual machines executing on a system of one or more computers. The compromise determination system 100 receives checkout system data associated with checkout systems (e.g., checkout system 104), including information describing processes executing on each checkout system and user account access information of each checkout system, and determines checkout systems or user accounts that are to be reviewed by a user (e.g., a system administrator on user device 130). A user device can include a computer (e.g., a system of one or more processors), a laptop, a tablet, a mobile device, a wearable computer, and so on.

The compromise determination system 100 includes a process compromise engine 112 that maintains, or is in communication with, a checkout system database 102 storing checkout system data obtained from checkout systems 104 deployed by one or more businesses. In some implementations, the compromise determination system 100 can communicate with each checkout system and provide a request for checkout system data. In some implementations, each checkout system can include an agent (e.g., a software agent executing on the checkout system) that can provide information to the compromise determination system 100, or an outside system that aggregates information and provides the aggregated information to the compromise determination system 100 for storage in the checkout system database 102. Checkout system data can include names of executing processes, locations in checkout systems that store the processes, hashes of the processes (e.g., a cryptographic hash), user accounts that initiated the processes, times of initiation of the processes, and so on.

The process compromise engine 112 can access the checkout system database 102, and compare the information describing processes executing on checkout systems to information stored in a whitelist processes database 106, which the compromise determination system maintains or is in communication with. The whitelist processes database 106 stores information describing processes known to be valid (e.g., not malicious or otherwise approved). For instance, the whitelist processes database 106 can include information describing processes that were included to execute on checkout systems from a manufacturer of the checkout systems, from a business associated with the installed checkout systems, from authorized (e.g., privileged) users associated with the business, and so on.

The process compromise engine 112 can compare the processes executing on checkout systems (e.g., using the checkout system database 102) to the processes known to be valid (e.g., using the whitelist processes database 106). Comparing can include comparing a name of a process executing on a checkout system to all the names included in the whitelist processes. Similarly, comparing can include comparing file locations, and comparing hashes of executable code associated with the processes.

Upon determining, by the process compromise engine 112, that a particular process executing on a particular checkout system is not known to be valid, the process compromise engine 112 can store information that flags (e.g., identifies) that particular checkout system and particular process for later review (e.g., by a system administrator). Additionally, in some implementations the process compromise engine 112 can scan through the checkout system database 102 to identify processes executing on other checkout systems that match with the particular process (e.g., match names or other identifiers, match file locations, match hashes), and upon identification of other processes, the process compromise engine 112 can similarly flag (e.g., identify) the checkout systems for later review.

The compromise determination system 100 includes a user account compromise engine 114 that obtains information from the checkout system database 102 identifying user account access information (e.g., the checkout system database 102 stores security logs, active directory logs obtained from the checkout systems). The user account compromise engine 114 further obtains information from a user profile database 108, which the compromise determination system 100 maintains, or in some implementations is in communication with. The user profile database 108 stores user account information associated with the checkout systems (e.g., user accounts that can access one or more checkout systems, or that can access systems configured to generate or create user accounts that can access one or more checkout systems). The information can include, for each user account, an identification of a name of a person associated with the user account, user accounts that the user account has transitioned to (e.g., a user can log-in with the user account, transfer to a second user account and so on), and so on.

The user account compromise engine 114 can determine whether user accounts are exhibiting anomalous user behavior. As described above, anomalous user behavior is any behavior associated with a user account that is indicative of a risk of compromise of the user account. In some implementations, the user account compromise engine 114 can generate alerts to associate with user accounts, and affected checkout systems, that are exhibiting anomalous user behavior, with each alert associated with a specific type of anomalous user behavior. For instance, an alert can identify that a user account is accessing a checkout system (e.g., with privileged administrator rights) that the user account has never accessed before. An alert can identify that a user account known to access checkout systems in a particular geographic region (e.g., country, state, city) has accessed one or more checkout systems outside of that geographic region. Similarly, an alert can identify that a user account which normally logs into checkout systems over a network (e.g., the Internet) from a particular geographic region (e.g., country) has logged into a checkout system from a different region (e.g., a different country). An alert can identify that a user account with privileged rights (e.g., administrator rights) has suddenly begun logging into a greater than average, or other measure of central tendency, amount of checkouts systems. Determining anomalous user behavior is described below, with reference to FIG. 4.

The compromise determination system 100 includes a transaction processing engine 116 in communication with the checkout system database 102 which further stores transaction data from the checkout systems (e.g., checkout system 104). Transaction data includes, at least, information describing payment instruments (e.g., credit cards) utilized in transactions that occurred through use of each checkout system, and can include credit card numbers, expiration dates, card verification values (CVV), and so on. The transaction data can be encrypted with appropriate security measures (e.g., encrypted with the Advanced Encryption Standard, and so on).

The transaction processing engine 116 can utilize the transaction data to store information describing payment instruments and checkout systems in which the payment instruments were utilized. In this way, a user (e.g., a system administrator) can determine which payment instruments are potentially compromised if a checkout system is determined to be compromised (e.g., a malicious process executing on it).

The compromise determination system 100 includes, or is in communication with, a presentation system 120 that provides user interface data 132 for presentation on user devices (e.g., in response to receiving a request from user device 130). The presentation system generates user interfaces to facilitate a user (e.g., a system administrator) determining whether a checkout system or user account has been compromised. The presentation system 120 can, for example, generate a user interface that presents identifications of checkout systems executing unknown processes (e.g., as illustrated in FIGS. 5-6). Similarly, the presentation system 120 can, for example, generate a user interface that presents identifications of user accounts identified as exhibiting anomalous user behavior (e.g., as illustrated in FIGS. 8-9). A user of the user device 130 can select information 134 identified in the received user interfaces (e.g., a specific process, a specific checkout system, a specific user account) and receive user interfaces identifying specific information about the selection 134. In this way, the user can receive a holistic view of the operation of the checkout systems, and quickly pivot on information that looks interesting, or suspicious (e.g., potentially malicious). User interfaces are described more fully below, with reference to FIGS. 5-12.

FIG. 3 is a flowchart of an example process 300 for determining checkout systems associated with a risk of compromise. For convenience, the process 300 will be described as being performed by a system of one or more computers (e.g., the compromise determination system 100).

The system obtains checkout system data from checkout systems (block 302). The system can receive checkout system data (e.g., information identifying processes executing on each checkout system, information identifying binaries or other executable code resident on each checkout system, and so on) directly from each checkout system, or in some implementations, the system receives the checkout system data from an intermediary system that aggregates the checkout system data. The checkout system data is stored for processing by the system, and associated with information identifying each checkout system (e.g., particular business the checkout system is associated with, a particular store the checkout system is included in, a location in the store, and so on).

The system determines whether the checkout system data identifies processes not known to be valid (block 304). The system obtains information identifying a whitelist, which includes information describing processes identified to the system as valid. As described above, a process known to be valid is a process included for execution on a checkout system by a manufacturer of the checkout system, by a business that utilizes the checkout system, by a privileged user associated with the business, and so on.

The system compares processes identified in the obtained checkout system data to the processed identified in the whitelist. The system can compare names of the processes (e.g., a name as seen by an operating system executing on a checkout system), file locations of the processes (e.g., locations of executable code associated with the processes in a file system included in a checkout system), hashes of the processes (e.g., cryptographic hashes of executable code associated with the processes).

If the system identifies processes in the obtained checkout system data that do not compare (e.g., match) to processes identified in the whitelist, the system stores information identifying that the process is not valid, and stores information identifying checkout systems that execute any of the processes. Additionally, the system can obtain information identifying user accounts that initiated the execution of the identified processes, and store information associating the user accounts with the identified processes.

The system generates user interface data describing the determined processes not known to be valid (block 306). As will be described below, with reference to FIG. 5, the system, or a presentation system in communication with the system, generates user interface data identifying processes not known to be valid. The user interface data can include summary data identifying a total number of processes executing on the checkout systems that are not known to be valid, a total number of checkout systems executing processes that are not known to be valid, and a total number of checkout systems executing each process not known to be valid.

The generated user interface can be included in a document (e.g., a web page) configured to be received by a user device and displayed (e.g., in a web browser). A user of the user device can select information included in the user interface, such as a particular process not known to be valid, a particular checkout system, and so on. Upon selection of information, the system generates user interface data directed to information associated with the selection, as will be described below with reference to FIGS. 5-12. Optionally, the user interface, or a representation of the user interface (e.g., modified, or otherwise formatted), can be presented in an e-mail, on a mobile device, on a wearable device, and so on.

As an example of a user selection of information, the system receives a user selection of a particular process not known to be valid (block 308). A user of the user interface (e.g., a user viewing the user interface on a web browser over a network such as the Internet) can provide a selection of a particular process (e.g., the user can use a mouse, keyboard, input on a touch screen device, audio input, to select the process).

Upon selection of the particular process, the system generates user interface data identifying the particular process (block 310). The user interface can include an identification of a name of the process (e.g., a file name), an identification of a risk level of the process, a number of checkout systems that are executing the process, a total time the process has been executing (e.g., a time that the process was first identified by the system), a number of geographic regions that include checkout systems executing the process, and so on. To determine a risk level of the process, the system can provide a hash of the process (e.g., a cryptographic hash of executable code associated with the process) to an outside system storing identifications of processes known to be malicious, and receive an identification of a risk level associated with the process. Additionally, the system can receive the risk level from a user (e.g., a system administrator can input the risk level).

The user interface can further identify all checkout systems executing the process, and the user can further select a checkout system and receive a user interface identifying a location of the checkout system, user accounts that have accessed the checkout system, and so on.

FIG. 4 is a flowchart of an example process 400 for determining user accounts exhibiting anomalous user behavior. For convenience, the process 400 will be described as being performed by a system of one or more computers, e.g., the compromise determination system 100.

The system obtains checkout system data from checkout systems (block 402). As described above, with reference to FIG. 3, the system obtains checkout system data (e.g., from the checkout systems or from an intermediary system). The checkout system data can include user account access information obtained from logs generated by the checkout systems (e.g. security logs, active directory logs, and so on). In some implementations, the system can obtain user account access information from active directory information stored on servers (e.g., domain controllers) in communication with checkout systems that respond to authorization requests from user accounts. The user account access information identifies user account access attempts, and actual user account access, of checkout systems.

The system determines anomalous user behavior from the checkout system data, and generates alerts identifying the anomalous user behavior (block 404). As described above, anomalous user behavior is any behavior associated with a user account that is indicative of a risk of compromise of the user account. In some implementations, the system can test for one or more user behaviors associated with a risk of compromise, and generate alerts associated with the one or more user behaviors for later review by a user (e.g., a system administrator).

For instance, the system can determine whether a particular user account has accessed one or more checkout systems for the first time, or a threshold amount of times (e.g., 2, 3, 5), and generate an alert identifying the particular user account and affected checkout systems.

The system can determine whether a user account has accessed a checkout system from a location not known to be associated with the user account. For instance, if a user (e.g., a service technician) historically logs into a checkout system from a particular region (e.g., California), and at some point logs into the checkout system from a different region (e.g., a different country or state), the system can generate an alert identifying the user account, checkout system, and location data.

The system can determine other types of anomalous user behavior, including determining user compromise scores each indicating user behavior that indicates, at least in part, that a user account has been compromised.

For instance, the system can determine a host score for a particular user account, which is a measure associated with checkout systems the particular user account accessed. The host score can be based off a number of checkout systems an average user account accesses, and a number of systems the particular user account normally accesses. In addition to a number of checkout systems, the host score can be greater if the particular user account has recently accessed checkout systems not historically associated with the particular user account.

The speed score for a particular user account measures how likely it is that a particular user account has accessed checkout systems in disparate locations in a period of time. For instance, if the particular user account accessed a first checkout system in a first location (e.g., Austin, Tex.), and a short period of time later (e.g., 15 minutes), accessed a second checkout system in a second location (e.g., San Francisco, Calif.), the speed score can indicate that one user could not travel fast enough between those two locations (e.g., the speed score can be associated with a user-definable maximum velocity, speed, necessary to have traveled between two locations in a period of time, which can be based on historical information, and so on).

The location score for a particular user account measures risk associated with the locations from which the particular user account accessed a checkout system. For instance, a particular geographic region can be known (e.g., to a system administrator) to be associated with malicious activity. The location score can thus be greater if the checkout system is being accessed from the particular geographic region.

The system can determine other types of anomalous user behavior, for instance described in Ser. No. 14/982,699, titled “ANOMALOUS NETWORK MONITORING, USER BEHAVIOR DETECTION AND DATABASE SYSTEM,” which is hereby incorporated by reference herein in its entirety for all purposes.

The system generates user interface data describing the determined anomalous user behavior (block 406). As will be described below, with reference to FIGS. 8-9, the system, or a presentation system in communication with the system, generates user interface data that can summarize the determined anomalous user behavior. For instance, the summary data can include a number of user accounts associated with anomalous user behavior, summary data of specific types of alerts identifying anomalous user behavior, and so on.

In addition to presenting summary data, the system can include identifications of each user account associated with anomalous user behavior, along with checkout systems accessed by each user account, specific types of anomalous user behavior exhibited by each user account, historical information associated with each user account (e.g., previously exhibited anomalous user behavior), and so on.

A user of the user interface (e.g., a system administrator) can select a user account, and the system can generate a user interface identifying user profile data associated with the selected user account (e.g., identifying an employee role associated with the user account, access rights of the user account, geographic region of the employee, and so on.)

Additionally, as an example, the system can receive a selection of a checkout system and the system can generate a user interface describing user account access information associated with the checkout system (block 408). For instance, the generated user interface can identify a location of the checkout system, a number of user accounts that attempted to access the checkout system (e.g., within a particular time period), a number of access attempts that resulted in a failed log-in, types of anomalous user behavior associated with user accounts that attempted to access, or accessed, the checkout system. An example of such a user interface is described below, with reference to FIG. 10. In some implementations, the system can also include process information, (e.g., processes not know to be valid described above with reference to FIG. 3), associated with the selected checkout system in the user interface (e.g., illustrated in FIG. 10).

User Interfaces

User interfaces described in FIGS. 5-12 are examples of interactive user interfaces generated by the system, or a presentation system in communication with the system, and presented on a user device. In some implementations, the user interfaces can be presented on the user device as a document (e.g., a web page) in an application (e.g., a web browser).

Each of the user interfaces described below includes user selectable options that upon selection can cause the system to obtain associated information (e.g., from databases 102, 104, 108), determine updated information, and modify, or generate, user interface data. The user interfaces can provide a reviewing user (e.g., a system administrator, a security officer, a service technician) insights into complex networks with large numbers of checkout systems and user accounts, by obtaining disparate information spread across checkout systems, and providing easy to understand summary data for a reviewing user.

Each example user interface described below includes a selectable option for the reviewing user to specify a particular time range that interests him/her. Upon receiving a selected time range, the system can access one or more databases (e.g., databases 102, 104, 108) and determine information associated with the time range to provide to the reviewing user.

FIG. 5 illustrates an example user interface 500 describing processes executing on checkout systems that are not known to be valid. The user interface 500 can be displayed on a user device, and in some implementations can be a document (e.g., a web page) configured to be received over a network (e.g., a local area network, the Internet) and displayed on the user device (e.g., in a web browser).

In the illustration of FIG. 5, a user of the user interface (e.g., a system administrator monitoring checkout systems deployed across a business) has selected a selectable option 502 identifying that he/she wants to view “SCO/MCX” information, which identifies checkout system information. Additionally, the user has selected “Summary” data 504, identifying that he/she wants to view an overview of the checkout systems, including processes not known to be valid. The “Summary” data 504 user interface can further include information regarding anomalous user behavior, which is described below with reference to FIG. 8.

The user interface 500 includes user selectable options including a time window 506 (e.g., a date range), which the user can set to view process information associated with the time window 506. As illustrated in FIG. 5, the time window 506 is set to “May 2015”, and the graphs 508, as illustrated, include information from the selected time window 506.

The user interface 500 includes summary data, including a number of processes not know to be valid 510, which in the example of FIG. 5 is “273”, and a number of checkout systems 512 executing processes not known to be valid, which in the example is “35,076”. As described in the user interface 500, the number “273” is based off hash comparisons (e.g., as described above with reference to FIG. 3), however in some implementations the number can include process name comparisons, process location comparisons, or a combination.

FIG. 6 illustrates an example user interface 600 identifying processes not know to be valid. The user interface 600 can be provided for presentation on a user device, upon user selection of “Process Alerts”, in contrast to “Summary” data as described above in FIG. 5. The “Process Alerts” selection provides detailed information regarding processes executing on checkout systems that are not known to be valid.

In this way, a user (e.g., a system administrator), can view an overall summary of the checkout systems, and then view identifications of the specific processes not known to be valid. For instance, if a system administrator is located in a particular region, he/she might want to view information identifying processes not know to be valid that are executing on checkout systems in his/her region. The user can select a selectable filter 602 to filter by region, and view processes executing on checkout systems located in the region.

The user interface 600 includes identifications of processes not known to be valid 604, a number of checkout systems (“hosts”) 606 that execute each process, a time the process was last determined to be executing 608, and a hash of the process (e.g., a cryptographic hash of executable code associated with the process) 610. Additionally, the user interface 600 is configured to receive labels 612, notes, a time reviewed, and other descriptive text from a user (e.g., a system administrator). In this way, the user can keep track of processes that he/she has reviewed, or has yet to review.

FIG. 7 illustrates an example user interface 700 displayed upon selection of a particular process not known to be valid. The selected process with filename 702 “example.exe” and hash 704 (e.g., MD5 hash) “1D9B64DC0A5221247208F8XXXX12345”, was selected by a user from the user interface 600, described above in FIG. 6.

After selection of the process, user interface 700 is generated with information identifying the process (e.g., file name, hash), and an associated risk level 706 of the process. The risk level 706 can be determined by the system (e.g., the compromise determination system 100) by providing a hash of the process to an outside system, and receiving an identification of the risk level 706. In some implementations, the risk level 706 can be determined by the system after determining the effects of the process (e.g., through monitoring of the processes actions in an operating system executing on a checkout system). For instance, if the process is determined to be monitoring payment instruments used by consumers (e.g., skimming credit card numbers), the process can be identified as having a “Critical” risk level. Additionally, a user (e.g., a system administrator) can input a risk level 706 for the process, and if the process is determined to be executing on a checkout system at a later point, the system can automatically apply the risk level 706. Optionally, the risk level can be obtained through searching a hash value associated with the process (e.g., searching the common vulnerability scoring system, and other outside systems and databases).

The user interface 700 includes a portion in which a user (e.g., a system administrator) can include descriptive text 708 identifying the reviewing user, checkout systems he/she has investigated and/or fixed to remove the process, a time the user took an actions, and any notes the user desires to include (e.g., so other users can view the notes if the process is determined to be executing at a later point in time).

The user interface 700 further includes summary data regarding the process, including a total number of times the process has been determined to be executing 710, a total number 712 of checkout systems executing the process (e.g., within a particular user selectable time period), a total number 714 of file locations executable code associated with the process have been found in, a number of regions 716 (e.g., user selectable areas or other identifiers of regions) that checkout systems executing the process are location in, and a total time 718 (e.g., number of days as illustrated) the process has been determined to be executing.

Each portion of summary data (e.g., 710-718) can be selectable by a user, and upon selection, details 720 regarding the selection can be presented.

For instance, upon selection of portion 710, the user interface 700 can present historical information regarding the process (e.g., checkout systems affected, regions in which the process was determined to be executing).

Upon selection of portion 712, the user interface 700 can present an identification of the checkout systems presently affected, and the user can select the checkout system to view information associated with the checkout system (e.g., processes executing on the checkout system, a location of the checkout system, user accounts with access rights to the checkout system, and so on).

Upon selection of portion 714, the specific location of executable code associated with the process can be presented. If more than location is detected (e.g., on a single checkout system, or across different checkout systems), the locations can be presented along with identifications of respective checkout systems.

Upon selection of portion 716, identifications of regions which include checkout systems executing the process are presented. For instance, a map of a region (e.g., a country, a state, a province, a city) can be presented along with information indicating density of locations of the affected checkout systems (e.g., a heat map).

Upon selection of portion 718, information identifying a spread of the process executing on disparate checkout systems can be presented. That is, the user interface 700 can display (e.g., chart or graph) a rise of the process executing on disparate checkout systems, including associated information such as location or region of each checkout system, and user accounts that initiated the execution of the process.

FIG. 8 illustrates an example user interface 800 describing anomalous user behavior on checkout systems. As described above, in FIG. 5, a user of the user interface 800 (e.g., a system administrator monitoring the checkout systems deployed across a business) can selected an option identifying that he/she wants to view “Summary” data regarding anomalous user behavior of checkout systems.

The user interface 800 includes user selectable options including a time window (e.g., a date range), which the user can set to view summary data associated with the time window. As illustrated in FIG. 8, the time window is set to “May 2015”, and the graphs, as illustrated, include information from the selected time window.

The summary data includes an identification of a number of alerts 802 generated by the system (e.g., the compromise determination system 100), with each alert identifying particular anomalous use behavior. In the example of FIG. 8, the user interface 800 identifies that “514” anomalous user alerts have been generated 802, and includes descriptive text regarding anomalous user behavior, “Anomalous user behavior spanning excessive login velocity, accounts never before used in the secure domain, and behavioral trending.”

In some implementations, portion 802 can be selected by the user, and upon selection, the user interface 800 can be updated to present identifications of each of the generated alerts (e.g., described below with reference to FIG. 9).

Additionally, the summary data includes an identification of a total number of user accounts with unsuccessful log-in attempts and successful log-in attempts 804. A user of the user interface 800 (e.g., a system administrator) can monitor the number of unsuccessful log-in attempts to determine whether a malicious actor is attempting to access a user account (e.g., through a brute-force attack, a dictionary based password attack, and so on). Similar to the above description of alerts, alerts can be generated based on particular thresholds being met or satisfied, for instance a threshold associated with a number of unsuccessful log-in attempts (e.g., a total amount over a period of time), or alerts can be generated based on a change in a volume of attempts over a period of time (e.g., the volume can be scaled, and percent increases can be determined over time, over a period of time, over respective periods of time, and so on). The system can actively monitor and determine information associated with generating alerts, such as various quantities including a number of unsuccessful log-in attempts quantities of processes not known to be valid, numbers of checkout systems executing processes not known to be valid, and so on, and can trigger notifications to be provided to, for instance, a user device or system for review. That is, the user device can execute an application in communication with the system (e.g., a specific application associated with checkout system monitoring), and the system can trigger the user device to present information describing the particular user account. Additional notifications can include e-mails, SMS, MMS, texts, phone call, and so on. In this way, the system can ensure that time-sensitive information associated with user accounts and/or checkout systems timely reaches an intended user (e.g., by activating an associated user device).

Similarly to portion 802, portion 804 can be selectable by the user, and upon selection, the user interface 800 can be updated to present identifications of checkout systems and respective numbers of unsuccessful/successful log-ins. Additionally, the user interface 800 can present a rate of change (e.g., a first and/or second derivative) of the number of log-in attempts, to determine a time period an attack on a checkout system took place.

FIG. 9 illustrates an example user interface 900 identifying user accounts and associated alerts identifying anomalous user behavior. The user interface 900 can be provided for presentation on a user device upon user selection of “User Alerts”, in contrast to “Summary” data as described above in FIG. 8. The “User Alerts” selection provides detailed information regarding user accounts and associated anomalous user behavior.

A user of the user interface 900 (e.g., a system administrator) can utilize the user interface 900 to quickly view all generated alerts associated with anomalous user behavior. The user interface 900 includes a list of user accounts 902, and associated information including checkout systems the user account accessed 904, a type of anomalous user behavior alert 906, areas the user can input information 908 regarding a status of review of the user account, a time the alert was triggered 910 (e.g., a day), and historical information associated with the alert 912.

As an example of historical information 912, for an alert (e.g., “NewUserInSecure”) identifying a user account that has never accessed a specific checkout system, the associated historical information 912 can identify a number of checkout systems the user account has accessed in the past, particular regions the user account is associated with, and so on.

As another example of historical information 912, an alert (e.g., “NewUserSuccessMax”) can identify that a user account has accessed greater than a threshold number of checkout systems in a period of time. The associated historical information 912 can identify a number of checkout systems the user account normally (e.g., a measure of central tendency) accesses in the period of time.

Each portion of information (e.g., 902-912) is configured to be selectable by the user, and the user interface 900 can be updated to provide information regarding the selection.

For instance, the user can select a specific user account 902, and the user interface 900 can be updated to provide information associated with the user account. The information can include a role of an employee associated with the user account, specific access rights associated with the user account, a region or location the employee is located in, regions the user account has accessed, checkout systems the user account has accessed or routinely (e.g., greater than a threshold number of times, or greater than a threshold frequency) accesses.

The user can select a specific checkout system 904, and the user interface 900 can be updated to provide information associated with the checkout system, which is described below with reference to FIG. 10.

The user can select a specific type of alert 906, and the user interface 900 can be updated to provide information solely regarding the type of alert. For instance, the user interface 900 can be updated to present all user accounts and respective checkout systems associated with the type of alert, descriptive text associated with the alert, previous alerts of the same type that were generated and dealt with by a user (e.g., a system administrator), and so on.

FIG. 10 illustrates a user interface 1000 after a user selection of a particular checkout system. The user interface 1000 can be provided after a user (e.g., a system administrator) selects the particular checkout system from the user interface described in FIG. 9. For instance, the user can view an anomalous user behavior alert, and want to view specific information associated with the checkout system.

The user interface 1000 includes an identification of the selected checkout system 1002, including a network domain and operating system associated with the selected checkout system 1002. Additionally, the user interface 1000 includes a location 1004 of the checkout system, which in the example of FIG. 10 is “Texas” and a type of store, e.g., “Large Store.”

The user interface 1000 further includes summary data associated with the checkout system 1002, including a number 1006 of unique user accounts that failed to successfully log into the checkout system 1002, a number 1008 of user accounts that are unique to the checkout system 1002 (e.g., a number of user accounts that have successfully accessed the checkout system, a number of user accounts that have access rights to the checkout system, or a number of user accounts that solely have access rights to the checkout system).

In addition to user account access information, the user interface 1000 includes process information, such as a number 1010 of processes not known to be valid that are executing on the checkout system 1002, and a number of processes 1012 that are only executing on the checkout system 1012 (e.g., a process unique to a particular checkout system might indicate a malicious process).

Each portion of summary data (e.g., portions 1006-1012) can be configured to be user selectable. For example, upon user selection of portion 1006, the user interface 1000 can be updated to view graph 1014, identifying historical information regarding numbers of unsuccessful and successful logins to the checkout system.

Upon user selection of portion 1008, the user interface 1000 can be updated to present historical data regarding user accounts unique to the checkout system, and/or identifications of user accounts presently unique to the checkout system. In this way, the user (e.g., system administrator), can quickly identify if the number of user accounts has risen suddenly (e.g., indicating a user escalated his/her access rights or created a new user account with access rights), or identify if the number of user accounts is growing for no specific business reason (e.g., increasing the likelihood that a user account can be compromised). Additionally, the user can compare the historical information to time periods that unknown processes 1010 began execution, or identify when a user account suddenly had access to a checkout system, and see if the user account initiated a process not known to be valid. In this way, the user can quickly determine whether the user account has been compromised.

Upon user selection of portion 1010, the user interface 1000 can be updated to present identifications of the processes executing, or previously executing, on the checkout system 1002 that are not known to be valid. Each identification can be selected, and the user interface can be updated to describe the selected process, as described above with reference to FIG. 7. Similarly, upon user selection of portion 1012, the user interface 1000 can be updated to present processes solely executing on the checkout system.

FIG. 11 illustrates an example user interface 1100 describing transaction data. The user interface 1100 can be presented upon user selection of the “Transactions” identifier 1102.

The user interface 1100 includes identifications of a number 1104 of unique payment instruments (e.g., credit cards as illustrated in the example) across all locations in a business, or in a particular region (e.g., a state such as Montana). Additionally, the user interface 1100 includes an average (e.g., a measure of central tendency) number 1106 of payment instruments for a time period (e.g., a day), and for a particular region (e.g., Montana).

A user can select a different region (e.g., using a map) and view transaction data associated with the region. Additionally, a heatmap 1108 can be presented, describing numbers of payment instruments processed according to region.

FIG. 12 illustrates an example user interface 1200 describing detailed information regarding transaction data in a particular region. The user interface 1200 includes identifications 1202 of locations (e.g., stores) associated with a business in a particular geographic region (e.g., Montana), and associated number of unique payment instruments. Additionally, the user interface 1200 includes identifications 1204 of processes not known to be valid that are executing on checkout systems included in locations identified in 1202.

Additional Embodiments

A system administrator can utilize the system (e.g., the compromise determination system 100) to determine that credit cards, utilized at a business, were compromised, and alert the affected consumers, or alert associated credit companies that can alert the affected consumers.

The system administrator can identify credit card numbers listed on web pages known to sell, or distribute, compromised credit cards. For instance, web pages that sell compromised credit cards can list a portion of information identified on each credit card, such as the first several numbers (e.g., 4, 6) numbers of a credit card, the last several numbers (e.g., 2, 4), expiration date, and so on.

The system administrator can obtain the portions of credit card numbers, and compare the numbers to transaction data stored by the system (e.g., transaction data from particular locations of the business). Upon a threshold percentage match (e.g., 70%, 80%, 90%), the system administrator can determine that the credit cards were obtained by a malicious actor from the locations.

Using the system, the system administrator can then determine when the credit cards were utilized at the locations, and the specific checkout systems utilized. The system administrator can determine whether any processes not known to be valid were executing on the checkout systems, and anomalous user behavior associated with the checkout systems. In this way, the system administrator can determine the method in which the checkout systems were modified by a malicious actor, and alert other consumers that could be affected (e.g., consumers that utilized the affected checkout systems).

Each of the processes, methods, and algorithms described in the preceding sections may be embodied in, and fully or partially automated by, code modules executed by one or more computer systems or computer processors comprising computer hardware. The code modules (or “engines”) may be stored on any type of non-transitory computer-readable medium or computer storage device, such as hard drives, solid state memory, optical disc, and/or the like. The systems and modules may also be transmitted as generated data signals (for example, as part of a carrier wave or other analog or digital propagated signal) on a variety of computer-readable transmission mediums, including wireless-based and wired/cable-based mediums, and may take a variety of forms (for example, as part of a single or multiplexed analog signal, or as multiple discrete digital packets or frames). The processes and algorithms may be implemented partially or wholly in application-specific circuitry. The results of the disclosed processes and process steps may be stored, persistently or otherwise, in any type of non-transitory computer storage such as, for example, volatile or non-volatile storage.

In general, the terms “engine” and “module”, as used herein, refer to logic embodied in hardware or firmware, or to a collection of software instructions, possibly having entry and exit points, written in a programming language, such as, for example, Java, Lua, C or C++. A software module may be compiled and linked into an executable program, installed in a dynamic link library, or may be written in an interpreted programming language such as, for example, BASIC, Perl, or Python. It will be appreciated that software modules may be callable from other modules or from themselves, and/or may be invoked in response to detected events or interrupts. Software modules configured for execution on computing devices may be provided on a computer readable medium, such as a compact disc, digital video disc, flash drive, or any other tangible medium. Such software code may be stored, partially or fully, on a memory device of the executing computing device, such as the compromise determination system 100, for execution by the computing device. Software instructions may be embedded in firmware, such as an EPROM. It will be further appreciated that hardware modules may be comprised of connected logic units, such as gates and flip-flops, and/or may be comprised of programmable units, such as programmable gate arrays or processors. The modules described herein are preferably implemented as software modules, but may be represented in hardware or firmware. Generally, the modules described herein refer to logical modules that may be combined with other modules or divided into sub-modules despite their physical organization or storage. Electronic Data Sources can include databases, volatile/non-volatile memory, and any memory system or subsystem that maintains information.

The various features and processes described above may be used independently of one another, or may be combined in various ways. All possible combinations and subcombinations are intended to fall within the scope of this disclosure. In addition, certain method or process blocks may be omitted in some implementations. The methods and processes described herein are also not limited to any particular sequence, and the blocks or states relating thereto can be performed in other sequences that are appropriate. For example, described blocks or states may be performed in an order other than that specifically disclosed, or multiple blocks or states may be combined in a single block or state. The example blocks or states may be performed in serial, in parallel, or in some other manner. Blocks or states may be added to or removed from the disclosed example embodiments. The example systems and components described herein may be configured differently than described. For example, elements may be added to, removed from, or rearranged compared to the disclosed example embodiments.

Conditional language used herein, such as, among others, “can,” “could,” “might,” “may,” “for example,” and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and/or steps. Thus, such conditional language is not generally intended to imply that features, elements and/or steps are in any way required for one or more embodiments or that one or more embodiments necessarily include logic for deciding, with or without author input or prompting, whether these features, elements and/or steps are included or are to be performed in any particular embodiment. The terms “comprising,” “including,” “having,” and the like are synonymous and are used inclusively, in an open-ended fashion, and do not exclude additional elements, features, acts, operations, and so forth. Also, the term “or” is used in its inclusive sense (and not in its exclusive sense) so that when used, for example, to connect a list of elements, the term “or” means one, some, or all of the elements in the list. Conjunctive language such as the phrase “at least one of X, Y and Z,” unless specifically stated otherwise, is otherwise understood with the context as used in general to convey that an item, term, etc. may be either X, Y or Z. Thus, such conjunctive language is not generally intended to imply that certain embodiments require at least one of X, at least one of Y and at least one of Z to each be present.

While certain example embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the disclosure. Thus, nothing in the foregoing description is intended to imply that any particular element, feature, characteristic, step, module, or block is necessary or indispensable. Indeed, the novel methods and systems described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions, and changes in the form of the methods and systems described herein may be made without departing from the spirit of the inventions disclosed herein. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of certain of the inventions disclosed herein.

Any process descriptions, elements, or blocks in the flow diagrams described herein and/or depicted in the attached figures should be understood as potentially representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process. Alternate implementations are included within the scope of the embodiments described herein in which elements or functions may be deleted, executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those skilled in the art.

It should be emphasized that many variations and modifications may be made to the above-described embodiments, the elements of which are to be understood as being among other acceptable examples. All such modifications and variations are intended to be included herein within the scope of this disclosure. The foregoing description details certain embodiments of the invention. It will be appreciated, however, that no matter how detailed the foregoing appears in text, the invention can be practiced in many ways. As is also stated above, it should be noted that the use of particular terminology when describing certain features or aspects of the invention should not be taken to imply that the terminology is being re-defined herein to be restricted to including any specific characteristics of the features or aspects of the invention with which that terminology is associated. 

What is claimed is:
 1. A computerized method for centrally monitoring execution of disparate computing devices for compromise via aggregation of machine data, the computing devices utilizing sensitive information, and the method being performed by one or more computer systems, wherein the computer systems are configured to access one or more electronic data sources in response to requests received from an interactive user interface, the method comprising: obtaining checkout system data associated with a plurality of checkout systems, wherein the checkout system data identifies processes executing in memory of each checkout system, and user account access information indicating user account access attempts to the checkout systems; wherein the plurality of checkout systems execute respective agents associated with monitoring, at least, processes executing in memory of the checkout systems, wherein monitored information is aggregated from the plurality of agents, and wherein a process represents code executing in an operating system of a checkout system; determining that the checkout system data identifies a first process, executing in memory of one or more compromised checkout systems, that is not known to be valid, wherein the first process represents code executing in operating systems of the one or more checkout systems; determining, using the user account access information, anomalous user behavior of a first user account, wherein determining anomalous user behavior comprises determining a speed score indicative of a measure that a single user could not travel fast enough between different locations in a period of time to access the first user account from the different locations and a location score that measures risk associated with geographic locations from which the first user account was used; generating user interface data describing the first process and the determined anomalous user behavior of the first user account; and providing at least a portion of the generated user interface data for presentation on a user device, wherein the computer systems are configured to generate time-sensitive notifications associated with compromised checkout systems and anomalous user behavior for transmission to a reviewing user.
 2. The method of claim 1, wherein determining that the first process is not known to be valid comprises: obtaining information describing a plurality of processes known to be valid, wherein a process known to be valid identifies that the process is not malicious; comparing information describing the first process to the obtained information describing a plurality of processes known to be valid; and determining that the obtained information does not describe the first process.
 3. The method of claim 2, wherein comparing information describing the first process to the obtained information describing a plurality of processes known to be valid comprises one or more of: comparing a name associated with the first process to respective names associated with the plurality of processes known to be valid, or comparing a file location, on a checkout system executing the first process in memory, of executable code associated with the first process to respective file locations, on checkout systems, of executable code associated with the plurality of processes known to be valid, or comparing a cryptographic hash of executable code associated with the first process to respective cryptographic hashes of executable code associated with the plurality of processes known to be valid.
 4. The method of claim 1, wherein determining anomalous user behavior of a first user account comprises at least one of: determining that the first user account accessed a particular checkout system with privileged access rights, or determining that the first user account accessed greater than a threshold number of checkout systems with privileged access rights, or determining, using historical information indicating geographical regions the first user account is associated with, that the first user account accessed a particular checkout system that is not included in the geographical regions indicated in the historical information.
 5. The method of claim 4, further comprising: generating an alert associated with the determined anomalous user behavior of the first user account, wherein the alert identifies one of the determinations that comprise determining user behavior of the first user account.
 6. The method of claim 1, wherein a portion of the generated user interface data includes information describing the first process and/or information describing the anomalous user behavior of the first user account.
 7. The method of claim 1, further comprising: receiving, from the user device, a selection of the first process; obtaining information identifying checkout systems that execute the first process in memory; and providing, for presentation on the user device in the interactive user interface, user interface data comprising a user selectable portion that identifies a number of checkout systems which execute the first process in memory, and upon a user selection of the selectable portion, the user interface data is configured to present an identification of each checkout system that executes the first process in memory.
 8. The method of claim 1, wherein the user interface data describing the determined anomalous user behavior of the first account includes an identification of a particular checkout system associated with the anomalous user behavior, and wherein the method further comprises: receiving, from the user device, a selection of the particular checkout system; obtaining information identifying a second process, executing on the particular checkout system, that is not known to be valid; and providing, for presentation on the user device, user interface data identifying the second process.
 9. The method of claim 1, wherein a particular process not known to be valid fraudulently copies sensitive information associated with transactions at a checkout system executing the particular process, and wherein the particular process relays the information to one or more outside systems.
 10. The method of claim 1, wherein for a time-sensitive notification associated with compromised checkout systems, the presented user interface data is configured to present summary information associated with user accounts utilized to access the compromised checkout systems, and wherein for a time-sensitive notification associated with anomalous user behavior, the presented user interface data is configured to present summary information associated with accesses to checkout systems by associated user accounts, thereby enabling the reviewing user to correlate between checkout systems and user accounts, and centrally monitor attacks on the checkout systems.
 11. A system comprising: agents executing on a plurality of checkout systems, the agents monitoring, at least, processes executing in memory of the checkout systems, and the agents generating information from the checkout systems for centralized compromise monitoring via one or more computers, wherein a process represents code executing in an operating system of a checkout system, and wherein one or more of the processes executing in memory of the checkout systems utilize sensitive information; and one or more computers that aggregate information obtained from the agents to monitor for indications of checkout systems being compromised, the one or more computers executing instructions stored in one or more storage devices that are operable to cause the one or more computers to perform operations comprising: obtaining checkout system data from a plurality of checkout systems, wherein the checkout system data identifies processes executing in memory of each checkout system, and user account access information indicating user account access attempts to the checkout systems; determining that the checkout system data identifies a first process, executing in memory of one or more compromised checkout systems, that is not known to be valid, wherein the first process represents code executing in operating systems of the one or more checkout systems; determining, using the user account access information, anomalous user behavior of a first user account, wherein determining anomalous user behavior comprises determining a speed score indicative of a measure that a single user could not travel fast enough between different locations in a period of time to access the first user account from the different locations and a location score that measures risk associated with geographic locations from which the first user account was used; generating user interface data describing the first process and the determined anomalous user behavior of the first user account; and providing at least a portion of the generated user interface data for presentation on a user device, wherein the computer systems are configured to generate time-sensitive notifications associated with compromised checkout systems and anomalous user behavior for transmission to a reviewing user.
 12. The system of claim 11, wherein determining that the first process is not known to be valid comprises: obtaining information describing a plurality of processes known to be valid, wherein a process known to be valid identifies that the process is not malicious; comparing information describing the first process to the obtained information describing a plurality of processes known to be valid; and determining that the obtained information does not describe the first process.
 13. The system of claim 12, wherein comparing information describing the first process to the obtained information describing a plurality of processes known to be valid comprises one or more of: comparing a name associated with the first process to respective names associated with the plurality of processes known to be valid, or comparing a file location, on a checkout system executing the first process in memory, of executable code associated with the first process to respective file locations, on checkout systems, of executable code associated with the plurality of processes known to be valid, or comparing a cryptographic hash of executable code associated with the first process to respective cryptographic hashes of executable code associated with the plurality of processes known to be valid.
 14. The system of claim 11, wherein determining anomalous user behavior of a first user account comprises at least one of: determining that the first user account accessed a particular checkout system with privileged access rights, or determining that the first user account accessed greater than a threshold number of checkout systems with privileged access rights, or determining, using historical information indicating geographical regions the first user account is associated with, that the first user account accessed a particular checkout system that is not included in the geographical regions indicated in the historical information.
 15. The system of claim 14, further comprising: generating an alert associated with the determined anomalous user behavior of the first user account, wherein the alert identifies one of the determinations that comprise determining user behavior of the first user account.
 16. The system of claim 11, wherein a portion of the generated user interface data includes information describing the first process and/or information describing the anomalous user behavior of the first user account.
 17. The system of claim 11, further comprising: receiving, from the user device, a selection of the first process; obtaining information identifying checkout systems that execute the first process in memory; and providing, for presentation on the user device, user interface data comprising a user selectable portion that identifies a number of checkout systems which execute the first process in memory, and upon a user selection of the selectable portion, the user interface data is configured to present an identification of each checkout system that executes the first process in memory.
 18. The system of claim 11, wherein the user interface data describing the determined anomalous user behavior of the first account includes an identification of a particular checkout system associated with the anomalous user behavior, and wherein the method further comprises: receiving, from the user device, a selection of the particular checkout system; obtaining information identifying a second process, executing on the particular checkout system, that is not known to be valid; and providing, for presentation on the user device, user interface data identifying the second process.
 19. The system of claim 11, wherein for a time-sensitive notification associated with compromised checkout systems, the presented user interface data is configured to present summary information associated with user accounts utilized to access the compromised checkout systems, and wherein for a time-sensitive notification associated with anomalous user behavior, the presented user interface data is configured to present summary information associated with accesses to checkout systems by associated user accounts, thereby enabling the reviewing user to correlate between checkout systems and user accounts, and centrally monitor attacks on the checkout systems.
 20. A method performed by one or more processors comprising: receiving, from a system, a document for presentation describing a plurality of processes executing on a plurality of checkout systems that are not known to be valid, and one or more user accounts determined, by the system, to be associated with anomalous user behavior, wherein anomalous user behavior comprises a speed score indicative of a measure that a single user could not travel fast enough between different locations in a period of time to access a respective user account from the different locations and a location score that measures risk associated with geographic locations from which the respective user account was used, wherein the plurality of checkout systems execute respective agents associated with monitoring, at least, processes executing on the checkout systems, wherein a process represents code executing in an operating system of a checkout system, and wherein monitored information is aggregated from the plurality of agents; providing the document for presentation, wherein presentation includes presenting summary data describing the plurality of processes and summary data describing the anomalous user behavior indicating alerts, generated by the system, associated with respective types of anomalous user behavior, and wherein the presentation is responsive to user input and enables presentation of correlations between the summary information associated with checkout systems and the summary information associated with user accounts; receiving, user input from a user, a selection of a portion of data included in the presentation; and providing, for presentation, information associated with the selected portion of data. 